Dotcase: Improve handling of notifications

Handle and draw notifications in the order they are returned by the
INotificationManager (i.e., the order they were posted). This new
handling is also easier to extend with new apps (for existing sprites)
and new sprites altogether.

Also, if there are more than 6 notifications to draw, only draw the
first 5 and add a "..." sprite at the end. Now that we have a way to
handle more than 6 notifications, we can add more types of
notifications.

PS2: Use a Map instead of a bunch of Sets to map package names to
notification types

Change-Id: I4eba49420fb56028610a306585a977462c6f4113
Dotcase: use real twitter blue

Change-Id: I68e081bc7f224cc999d8b86ef6728b748eb3a2fc
m8: Keep two cores online

 * The recommended behavior for 8974pro is to keep two cores online
   at all times, as all cores can enter full power collapse at any
   time. Recently, we upgraded the perf lib which controlled this,
   and this new property is required to achieve the behavior we want.

Change-Id: I53d2197ca9aea80b10684ab436c9cc5b1c7f6c18
Dotcase: Support additional apps

- Added support and sprites for email, snapchat, and facebook
- Added a pile of email, twitter, and mms apps

Change-Id: Ief355abfa953cca76b0b1fa2ad05c4b7a82fe6f9